#cylinder.solid  a solid bounded by a cylindrical surface and two parallel planes (the bases)
  supertype:  #solid.shape  a three-dimensional shape
  subtype:  #roll.cylinder  anything rolled up in cylindrical form
     subtype:  #bolt.roll  a roll of cloth or wallpaper of a definite length
     subtype:  #rouleau  a roll of coins wrapped in paper
     subtype:  #rouleau.roll  a roll of ribbon
  subtype:  #roller.cylinder  a cylinder that revolves
     subtype:  #garden_roller  heavy cast-iron cylinder used to flatten lawns
     subtype:  #paint_roller__paintroller  a roller that has an absorbent surface used for spreading paint
     subtype:  #platen  the roller on a typewriter against which the keys strike
     subtype:  #sprocket  roller that has teeth on the rims to pull film or paper through
     subtype:  #trundle  small wheel or roller
  subtype:  #prayer_wheel  a cylinder with Tibetan Buddhist prayers written on it; each revolution counts as uttering prayers

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